@keyframes pulse {
  0% {
    transform: scale3d(1, 1, 1);
  }
  50% {
    transform: scale3d(1.5, 1.5, 1.5);
  }
  100% {
    transform: scale3d(1, 1, 1);
  }
}

.pulse {
  animation: pulse 1s infinite;
}
